books.google.com - In The Origin of Species, Charles Darwin refused to discuss human evolution, believing the subject too “surrounded with prejudices.” He had been reworking his notes since the 1830s, but only with trepidation did he finally publish The Descent of Man in 1871. The book notoriously put apes in our family...http://books.google.com/books/about/The_Descent_of_Man_and_Selection_in_Rela.html?id=SOiEo1tEnsoC&q=butterflies&utm_source=gb-gplus-shareThe Descent of Man, and Selection in Relation to Sex